Dodge Dakota (R1). Manual — part 40
TEST
ACTION
APPLICABILITY
6
Note: Ensure there is PCI Bus communication with other modules on the
vehicle before proceeding. If not, refer to the symptom list from the menu
and repair as necessary.
Disconnect the TCM harness connector.
Use Scope input cable CH7058, Cable to Probe adapter CH7062, and the red and
black test probes.
Connect the scope input cable to the channel one connector on the DRB. Attach the
red and black leads and the cable to probe adapter to the scope input cable.
With the DRBIII
t select Pep Module Tools.
Select lab scope.
Select Live Data.
Select 12 volt square wave.
Press F2 for Scope.
Press F2 and use the down arrow to set voltage range to 20 volts. Press F2 again
when complete.
Connect the Black lead to the chassis ground. Connect the Red lead to the PCI Bus
circuit in the TCM connector.
Turn the ignition on.
Observe the voltage display on the DRB Lab Scope.
Does the voltage pulse from 0 to approximately 7.5 volts?
All
Yes
→
No
→
Repair the PCI Bus circuit for an open.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.
7
If there are no possible causes remaining, view repair.
All
Repair
Replace the Transmission Control Module in accordance with the
Service Information.
Perform 45RFE TRANSMISSION VERIFICATION TEST - VER
1.
157
COMMUNICATION
*NO RESPONSE FROM THE TRANSMISSION CONTROL MODULE —
Continued
Symptom:
*PCI BUS COMMUNICATION FAILURE
POSSIBLE CAUSES
WITH THE DRB PERFORM A MODULE SCAN
OPEN PCI BUS CIRCUIT AT THE DATA LINK CONNECTOR
USING THE DRB, PERFORM THE PCI BUS CONTROL MODE
DISCONNECT THE MODULE HARNESS CONNECTOR
PCI BUS CIRCUIT SHORTED TO VOLTAGE
DISCONNECT THE MODULE HARNESS CONNECTOR
PCI BUS CIRCUIT SHORTED TO GROUND
WIRING HARNESS INTERMITTENT FAILURE
TEST
ACTION
APPLICABILITY
1
Note: Determine which modules this vehicle is equipped with before begin-
ning.
Connect the Diagnostic Junction Port Tester #8339 to the DRB and to the Diagnostic
Junction Port.
Using the DRB, along with the Diagnostic Junction Port Tester #8339, select
Junction Port Tool then PCI Bus Module Scan and follow the instructions on the
DRB.
Was the DRB able to scan (I/D or communicate) with any modules?
All
Yes
→
Refer to the Communication category for the related symptom(s).
(Individual module no responses).
Perform BODY VERIFICATION TEST - VER 1.
No
→
2
Turn the ignition off.
Measure the resistance of the PCI Bus circuit between the Data Link Connector and
the Diagnostic Junction Port connector.
Is the resistance below 5.0 ohms?
All
Yes
→
No
→
Repair the PCI Bus circuit for an open between the DLC and the
Diagnostic Junction Port.
Perform BODY VERIFICATION TEST - VER 1.
158
COMMUNICATION
TEST
ACTION
APPLICABILITY
3
Note: Determine which modules this vehicle is equipped with before begin-
ning.
Connect the Diagnostic Junction Port Tester #8339 to the DRB and to the Diagnostic
Junction Port.
Using the DRB, along with the Diagnostic Junction Port Tester #8339, select
Junction Port Tool then PCI Bus Control Mode and follow the instructions on the
DRB.
Note: Perform this function on each pin that is equipped with a PCI Bus
circuit.
Did the DRB display No Modules Responding from any of the pins that were
scanned?
All
Yes
→
No
→
Check the PCI Bus circuit between the DLC and the Diagnostic
Junction Port connector for a short to voltage or to ground, repair
as necessary.
Perform BODY VERIFICATION TEST - VER 1.
4
Disconnect the Diagnostic Junction Port Tester cable from the DRB. Keep the tester
connected to the Diagnostic Junction Port.
Turn the ignition on.
Measure the voltage of the PCI Bus circuit on the Diagnostic Junction Port Tester
that the DRB displayed No Modules Responding.
Is the voltage steadily above 7.0 volts?
All
Yes
→
No
→
5
Measure the voltage of the PCI Bus circuit on the Diagnostic Junction Port tester
that previously measured above 7.0 volts.
Note: Turn the ignition off before disconnecting any module harness
connector then turn the ignition on.
Disconnect the module harness connector(s).
Is the voltage steadily above 7.0 volts with the module disconnected.
All
Yes
→
Repair the PCI Bus circuit that measured over 7.0 volts for a
short to voltage.
Perform BODY VERIFICATION TEST - VER 1.
No
→
Replace the module that when disconnected the short to voltage
was eliminated.
Perform BODY VERIFICATION TEST - VER 1.
6
Disconnect the Diagnostic Junction Port Tester cable from the DRB. Keep the tester
connected to the Diagnostic Junction Port.
Turn the ignition off.
Disconnect the negative battery cable.
Measure the resistance between ground and the PCI Bus circuit on the Diagnostic
Junction Port Tester that the DRB displayed No Modules Responding.
Is the resistance below 100.0 ohms?
All
Yes
→
No
→
159
COMMUNICATION
*PCI BUS COMMUNICATION FAILURE —
Continued
TEST
ACTION
APPLICABILITY
7
Disconnect the negative battery cable.
Measure the resistance between ground and the PCI Bus circuit at the Diagnostic
Junction Port tester that previously measured below 100.0 ohms.
Disconnect the module harness connector(s).
Is the resistance below 100.0 ohms with the module disconnected.
All
Yes
→
Repair the PCI Bus circuit that measured below 100.0 ohms for a
short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→
Replace the module that when disconnected the short to ground
was eliminated.
Perform BODY VERIFICATION TEST - VER 1.
8
Turn the ignition off.
Note: Visually inspect the related wiring harness. Look for any chafed,
pierced, pinched, or partially broken wires.
Note: Visually inspect the related wire harness connectors. Look for broken,
bent, pushed out, or corroded terminals.
Were any problems found?
All
Yes
→
Repair wiring harness/connectors as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No
→
Test Complete.
160
COMMUNICATION
*PCI BUS COMMUNICATION FAILURE —
Continued
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